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CN107521476A - Power drive system is braked and the method and assembly of friction catch vehicle - Google Patents

Power drive system is braked and the method and assembly of friction catch vehicle Download PDF

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Publication number
CN107521476A
CN107521476A CN201710429082.5A CN201710429082A CN107521476A CN 107521476 A CN107521476 A CN 107521476A CN 201710429082 A CN201710429082 A CN 201710429082A CN 107521476 A CN107521476 A CN 107521476A
Authority
CN
China
Prior art keywords
drive system
brake
power drive
vehicle
friction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710429082.5A
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Chinese (zh)
Other versions
CN107521476B (en
Inventor
戴尔·斯科特·克劳姆贝兹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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Filing date
Publication date
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Publication of CN107521476A publication Critical patent/CN107521476A/en
Application granted granted Critical
Publication of CN107521476B publication Critical patent/CN107521476B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • B60L15/2018—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking for braking on a slope
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/24—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle inclination or change of direction, e.g. negotiating bends
    • B60T8/245—Longitudinal vehicle inclination
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • B60W10/184—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B60W30/18127—Regenerative braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/60—Regenerative braking
    • B60T2270/604—Merging friction therewith; Adjusting their repartition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/60—Regenerative braking
    • B60T2270/611—Engine braking features related thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/18—Braking system
    • B60W2710/182—Brake pressure, e.g. of fluid or between pad and disc
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

A kind of illustrative methods are included when vehicle deceleration is braked into the two using friction catch and power drive system to when stopping, and the application lifts accelerator pedal in response to driver.Exemplary assembly includes power drive system brake, friction brake and brake monitor, and brake monitor is configured to lift accelerator pedal in response to driver and the braking of order power drive system brake application power drive system and order friction brake applications friction catch stop vehicle.

Description

Power drive system is braked and the method and assembly of friction catch vehicle
Technical field
The disclosure relates generally to abrupt deceleration vehicle, and is made more particularly, to being braked and being rubbed using power drive system Dynamic combination is without driver and the braking of brake pedal interaction.
Background technology
Braking can make mobile vehicle deceleration to stopping.Friction catch resists motion to make by using friction brake Vehicle deceleration.Power drive system braking resists motion to make vehicle deceleration by using engine, motor or both.
When driver lifts accelerator pedal, some vehicles subtract the vehicle of motion using power drive system braking Speed.Although driver has lifted accelerator pedal, although by power drive system braking deceleration, vehicle can continue to Motion.Motion is slowly advanced and will continued, and until driver presses brake pedal, this causes vehicle application friction brake to promote Stop vehicle.
Some electric vehicles include to make when driver lifts accelerator pedal the vehicle deceleration of motion to stopping Function.These electric vehicles are braked to make the vehicle deceleration of motion by using the power drive system of motor.If these are electric The battery of motor-car can not store the electricity as caused by motor during power drive system is braked, then electric vehicle suspends the work( Energy.
The content of the invention
A kind of exemplary method according to the disclosure, include except other things, when by vehicle deceleration to stop when applying Friction catch and power drive system braking.The application lifts accelerator pedal in response to driver.
The further non-limiting example of the above method is included using friction catch without driving brake pedal.
Any of above further non-limiting example of method includes, and during application, reduces power drive system braking And compensate the reduction by increasing friction catch.
In the further non-limiting example of any above method, speed and friction that power drive system braking reduces It is identical to brake increased speed.
Any of above further non-limiting example of method includes, and during application, is reduced with first rate slope (ramp out) brakes caused deceleration by power drive system, and is increased with second rate ramp proportional to first rate Add (ramp in) deceleration as caused by friction catch.
In the further non-limiting example of any above method, friction catch is autonomous friction catch.
In the further non-limiting example of any above method, stopping is to stop completely.
In the further non-limiting example of any above method, stop in the road grade no more than 33%.
In the further non-limiting example of any above method, vehicle is electric vehicle.
A kind of assembly according to disclosure another exemplary, include except other things, power drive system brake, friction Brake and brake monitor.Brake monitor is configured to lift accelerator pedal in response to driver and order PWTN The braking of system brake application power drive system and order friction brake applications friction catch stop vehicle.
In the further non-limiting example of above-mentioned assembly, power drive system brake is internal combustion engine.
In the further non-limiting example of above-mentioned assembly, power drive system brake is motor.
In the further non-limiting example of any of above assembly, vehicle is electric vehicle.
In the further non-limiting example of any of above assembly, power drive system braking and friction catch promote car Completely stop.
In the further non-limiting example of any of above assembly, power drive system braking and friction catch promote car Stop completely in the road grade no more than 33%.
Any of above further non-limiting example of assembly includes brake pedal.Controller is configured to when driver lifts During accelerator pedal, order friction brake applications friction catch interacts without driver and brake pedal.
In the further non-limiting example of any of above assembly, controller is configured to lift acceleration in response to driver Device pedal and order power drive system braking reduce and the increase of order friction catch come compensate power drive system braking Reduce.
In the further non-limiting example of any of above assembly, controller is configured to order power drive system with One speed reduce and order friction catch with first rate identical second speed increase.
In the further non-limiting example of any of above assembly, controller is configured to lift acceleration in response to driver Device pedal and order power drive system braking make by power drive system brake caused by slow down with first rate slope reduce, And order friction catch makes as caused by friction catch to slow down with the second rate ramp increase proportional to first rate.
Brief description of the drawings
By being described in detail, the various features and advantage of disclosure example will become aobvious and easy for those skilled in the art See.Appended accompanying drawing is described in detail to can be briefly described as follows：
Fig. 1 shows the partial schematic diagram of example vehicle；
Fig. 2 shows the high-level schematic of Fig. 1 vehicle；
Fig. 3 show when by vehicle deceleration to stop when being transmitted power drive system braking and friction catch curve Figure；
Fig. 4 is shown to be lifted accelerator pedal and stops the illustrative methods of Fig. 1 vehicle in response to driver.
Embodiment
Friction catch, power drive system braking or both can make vehicle deceleration.This disclosure relates to use friction Braking and power drive system are braked to promote vehicle to stop completely, are interacted without driver and brake pedal.
With reference to figure 1 and Fig. 2, example vehicle 10 includes power drive system 14, multiple wheels 18, multiple friction brakes 22nd, at least one brake monitor 26, accelerator pedal 30 and brake pedal 34.At least one friction brake 22 and each car Wheel 18 is associated.
Exemplary power transmission system 14 includes but is not limited to internal combustion engine 36, motor 38 and traction battery 40.
Example vehicle 10 is the electric vehicle optionally driven using the moment of torsion provided by motor 38.Traction battery 40 Electric power is provided and carrys out motor 38.(such as during regenerative braking) may be used as generating electricity motor 38 in some operating conditions Machine, to be recharged to traction battery 40.Motor 38 can substitute or be additional to engine 36 to drive vehicle 10.
Example electric vehicle can include hybrid electric vehicle (HEV), plug-in hybrid electric vehicle (PHEV), fuel-cell vehicle (FCV) and battery electric vehicle (BEV).
Although being described with reference to electric vehicle 10, the teaching of the disclosure can apply to other vehicles, including Conventional vehicles without motor and traction battery.Compared with electric vehicle, conventional truck is used only the moment of torsion provided by internal combustion engine and driven It is dynamic.
In example vehicle 10, power drive system can apply power drive system to brake to make vehicle 10 slow down. The motion of power drive system braking resistance wheel 18, it makes wheel and vehicle 10 slow down.Motor 38 and engine 36 are power The type of transmission system brake.
Power drive system braking can include regenerative braking, and it is produced dynamic as motor 38 resists the motion of vehicle 10 Power.Electric power caused by motor 38 can be used for charging to traction battery 40.Power drive system braking can alternatively or separately Outside including the use of the resistance in engine 36 come the engine braking that slows down vehicle.
Example vehicle 10 can also make vehicle 10 slow down with friction brake 22.It is at least one when friction catch The order friction brake 22 of brake monitor 26 activates and slows down wheel 18.Friction brake 22 can include brake(-holder) block or braking Hoof, for example, it includes the wear surface of the motion of resistance wheel 18 when applicable.When application friction brake 22, sport(s) car 10 kinetic energy is converted into heat energy.
At least one brake monitor 26 can be whole vehicle system controller (VSC) part, or can be The single control system to be communicated with vehicle system controller.At least one brake monitor can include one or more independent Control module, the control module equipped with for interact and order with the various parts of vehicle 10 its operate executable finger Order.
When stopping vehicle 10 using brake pedal 34, driver generally starts to make car by lifting accelerator pedal 30 10 slow down.Then driver presses brake pedal 34 to promote vehicle 10 to stop completely.
Promote vehicle to stop completely, it is necessary to press brake pedal in the vehicle of many prior arts, then protect vehicle Hold in stop position.The vehicle of these prior arts includes some intrinsic Slip torques, if driver does not press braking Then the Slip torque can cause vehicle movement to pedal.Compared with the vehicle of those prior arts, example vehicle 10 can make Vehicle 10 slows down to promote vehicle 10 to stop, and brake pedal 34 is pressed without driver.
Referring now to Figure 3, and with continued reference to Fig. 1 and Fig. 2, curve map 48 shows and passed when vehicle 10 decelerates to stopping The power drive system braking passed and friction catch.Power drive system is braked and friction catch lifts acceleration in response to driver Device pedal 30 and transmit, and interacted without driver and brake pedal 34.Accelerator pedal is lifted in response to driver 30, at least one passing power transmission system of 26 order power drive system of brake monitor 14 braking is so that vehicle 10 slows down. Brake after deceleration, at least one brake monitor 26, passed in the order of time T1 in response to power drive system in vehicle 10 Friction catch is passed to slow down vehicle 10.
The friction catch slope of transmission increases to the braking always transmitted, and promotes vehicle 10 to stop completely in time T2.With Friction catch slope increases to the braking always transmitted, and the power drive system braking slope of transmission reduces.That is, work as vehicle 10 when being decelerated to close to zero velocity, the deceleration increase provided by friction catch, and subtracting of providing is braked by power drive system Speed reduces.
In this example, the power drive system of transmission is braked is reduced with first rate slope, and the friction system transmitted It is dynamic to be increased with second rate ramp proportional to first rate.The absolute value of first rate and the absolute value phase of the second speed Together.Therefore, the reduction that the power drive system of transmission is braked is compensated by increasing the friction catch transmitted.In this example In, first rate and the second speed are fixed ratios.
In another example, first rate and the second speed are non-fixed ratios.In such a example, due to power The caused deceleration of transmission system braking will non-linearly reduce in time T1, and due to slow down caused by friction catch when Between T2 will non-linearly increase.
Even if driver does not press brake pedal 34, friction brake 22 can also be applied.Friction brake 22 rubs Wipe braking and be therefore considered autonomous friction catch.
Friction brake 22 can be a part for line control brake system, and it passes through in response to being controlled from least one braking The signal of device 26 processed drives friction brake 22, rather than corresponds directly to driver and press brake pedal 34.Brake-by-wire System is a kind of from primary brake system, and it allows to arbitrate independent friction catch of certainly advocating peace with the least interference to driver. Traditional non-autonomous brakes is readily modified as providing braking function.However, such conventional system may be because of stepping on Plate is felt, vibration and the experience of noise change.
In a specific example, vehicle 10 is decelerated to and stopped completely using power drive system braking and engine braking Only need about ten seconds.Time T1 is about 8 seconds, and time T2 is about 10 seconds.Therefore, in the brake request of ten seconds is continued, rub Wipe brake application about two seconds, or promote vehicle 10 to stop 20 about percent required time completely.
In time T2, even if driver does not press brake pedal 34, vehicle 10 stops and by friction brake completely 22 are maintained at the position.Can order friction brake 22 to continue to keep vehicle 10 be that zero velocity prevents the rollback of vehicle 10 (i.e. mobile).It should be noted that in this example, the symbol of power drive system braking deceleration is considered negative, and T1 and Friction catch deceleration between T2 is considered as negative.When the vehicle is stopped, keeping vehicle to stop required friction eceleration can To be considered positive or negative, with confrontation be probably positive or negative road grade power.Fig. 3 provides an example, wherein Road grade needs friction eceleration reindexing at zero velocity, to prevent vehicle from rolling.Even if control deceleration symbol becomes Change, the friction catch physically transmitted will not also change.The influence of road grade is well-known to those skilled in the art.
At least one brake monitor 26 is operably linked to the part of vehicle 10.In this example, at least one system Movement controller 26 is operably linked to power drive system 14, wheel 18, friction brake 22, accelerator pedal 30 and braking Pedal 34.In other examples, at least one brake monitor 26 can be operably linked to more or less parts.
The brake monitor 26 of example includes the processor 42 for being operably linked to memory portion 44.The processing of example Device 42 is programmed to carry out the program being stored in memory portion 44.Program can be stored in memory portion as software code In 44.
The program being stored in memory portion 44 can include one or more programs additionally or separately, each program Include the ordered list of the executable instruction for realizing the logic function associated with abrupt deceleration vehicle 10.The instruction causes at least One brake monitor 26, accelerator pedal 30 is lifted in response to operator to adjust power drive system braking and friction catch Transmission with decelerating vehicles.
With reference now to Fig. 4 and with continued reference to Fig. 1 and Fig. 2, lift accelerator pedal in response to driver and stop vehicle 10 Illustrative methods 50 only include the step 54 that detection stops the request of vehicle.In this example, at least one brake monitor 26 lift driver the request that accelerator pedal 30 is construed to stop vehicle 10 completely.In another example, at least one system Driver partly but is incompletely lifted the request that accelerator pedal 30 is construed to stop vehicle 10 by movement controller 26.
Then, method 50 is moved to step 58, and wherein at least one brake monitor 26 determines that vehicle 10 decelerates to stopping Required total brake torque.Inter alia, the request can the speed based on vehicle 10, accelerator pedal position, power The slowing down power(SDP) of transmission system 14 and the predetermined deceleration mapping relative to these inputs.It will be appreciated by those skilled in the art that such as What Configuration Control Unit is to ask total braking torque.
In step 62, at least one order power drive system 14 of brake monitor 26 brakes using power drive system Decelerating vehicles 10.In step 64, the order friction brake 22 of at least one brake monitor 26 is using friction catch come the car that slows down 10.
In some instances, the power drive system braking response in step 62 reduces speed now vehicle in brake request 10.As friction catch slope increases, slope reduces therewith for the braking of power drive system, to promote vehicle 10 to stop completely.
In step 70, vehicle 10 stops in response to power drive system braking and friction catch, though driver not with Brake pedal 34 interacts.In order to which vehicle 10 is maintained at into stop position, even if vehicle 10 stops, at least one control for brake Device 26 can continue to order friction brake 22 and apply friction catch.It may need to continue to keep friction catch to prevent vehicle 10 roll, particularly if vehicle 10 is in the gradient.
Method 50 can be used in level ground and slow down and stop car on the ground with the positive or negative gradient in addition 10.In some instances, method 50 is especially suitable for the gradient no more than 33%.If the gradient more than 33%, is stopped really Only vehicle 10 can ask the driver of vehicle 10 to press brake pedal 34.
The feature of disclosed exemplary embodiment can include avoiding electricity when electric vehicle is at or approximately at zero velocity Machine it is more inefficient because controlled motor torsional moment has been ramped down zero.
Further, since stationary vehicle is kept using friction brake rather than power drive system braking, so with inciting somebody to action Vehicle is maintained at the energy efficiency being associated in the gradient essentially without loss.In the gradient, braked using power drive system It is horizontal there may be undesirable heat energy that vehicle is maintained to the position of stopping, and power drive system braking will not be unlimited Keep to phase.
In some electric vehicles, the controllability of the moment of torsion from motor is not problem, because due to power drive system Braking slope reduces, and when electric vehicle stops, the controlled torque of motor is zero.Therefore, controller need not rely on the static control of closed loop Method processed.Further, when the traction battery of electric vehicle is at or approximately at capacity, by means of the power drive system of motor Braking is probably difficult or its availability reduces.In these cases, friction catch can compensate provides the phase to electric vehicle The deceleration of prestige.No matter how the availability of power drive system braking is provided which to slow down.
Current explanation is substantially illustrative and not restrictive.This hair is need not necessarily depart to what the example of the disclosure was made Bright substantive deformation and change it will be apparent to those skilled in the art that.Therefore, the legal scope of the present invention is assigned Only determined by studying following claim.

Claims (19)

1. a kind of method, including：
When by vehicle deceleration, to when stopping, using both friction catch and power drive system braking, the application is in response to driving The person of sailing lifts accelerator pedal.
2. according to the method for claim 1, including the application friction catch is without driving brake pedal.
3. according to the method for claim 1, including, during application, reduce the power drive system and brake and lead to Crossing increases the friction catch to compensate the reduction.
4. according to the method for claim 3, wherein the power drive system braking the reduction speed with it is described The increased speed of friction catch is identical.
5. according to the method for claim 1, including, during application, reduced with first rate slope and passed by the power Slow down caused by dynamic Braking system, and made with the second rate ramp increase proportional to the first rate by the friction Slow down caused by dynamic.
6. according to the method for claim 1, wherein the friction catch is autonomous friction catch.
7. according to the method for claim 1, wherein described stop being to stop completely.
8. according to the method for claim 1, wherein described stop being in the road grade no more than 33%.
9. according to the method for claim 1, wherein the vehicle is electric vehicle.
10. a kind of assembly, including：
Power drive system brake；
Friction brake；With
Brake monitor, the brake monitor are configured to lift accelerator pedal in response to driver and order the power to pass Dynamic circuitry brake application power drive system is braked and orders the friction brake applications friction catch to stop vehicle.
11. assembly according to claim 10, wherein the power drive system brake is internal combustion engine.
12. assembly according to claim 10, wherein the power drive system brake is motor.
13. assembly according to claim 10, wherein the vehicle is electric vehicle.
14. assembly according to claim 10, wherein power drive system braking and friction catch promote the car Completely stop.
15. assembly according to claim 10, wherein power drive system braking and the friction catch promote institute Vehicle is stated in the road grade no more than 33% completely to stop.
16. assembly according to claim 10, including brake pedal, wherein the controller is configured to work as the driver When lifting the accelerator pedal, the friction brake applications friction catch is ordered without the driver and the braking The interaction of pedal.
17. assembly according to claim 10, wherein the controller be configured to lift in response to the driver it is described Accelerator pedal and order power drive system braking to reduce and order the friction catch increase described dynamic to compensate The reduction of power transmission system braking.
18. assembly according to claim 17, braked wherein the controller is configured to power drive system described in order Reduced with first rate and order the friction catch to increase with the speed of first rate identical second.
19. assembly according to claim 10, wherein the controller be configured to lift in response to the driver it is described Accelerator pedal and order power drive system braking with first rate slope reduce by the power drive system brake produce Deceleration, and order the friction catch to increase with second rate ramp proportional to the first rate by the friction Slow down caused by braking.
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